High-frequency vibrator



July 20,1948. v R, A ST 2,445,382

HIGHFREQUENCY VIBRATOR Filed April 14, 1944 A 'l/vve/vrofl ROBERT IAUST'A 7' TOR/YE) Patented July 20, 1948 HIGH-FREQUENCY VIBRATOR Robert J.Aust, Indianapolis, Ind.. assignor to P. R. Mallory I: 00., Inc.,Indianapolis, Ind., a

corporation of Delaware Application April 14, 1944, Serial No. 531,092

Claims. (Cl. 200-90) The present invention relates to vibrators, and.more particularly, to vibratory electromagnetic interrupters adaptableto operation at relatively high frequencies.

It is an object of the. present invention to provide a vibrator of theelectromagnetic interrupter type capable of converting the magneticdeflecting force of the driver coil into mechanical energy with which toactuate a system of contacts with greater eiliciency than this washeretofore possible.

It is another object of the present invention to provide a vibratoryelectromagnetic interrupter of novel and improved character in which arelatively rigid lever or rod is employed for transferring deflectingforcefrom the armature, or weight, to the vibratory contacts.

It is also within the contemplation of the invention to provide a novelvibratory interrupter organization in which practically all of thecompliance of the vibratory system is concentrated in the side springswhereby spurious oscillations ofthe contact supporting members,characteristic of conventional vibrator structures, are substantiallyeliminated.

. The invention also contemplates a vibratory interrupter capable ofproducing relatively high interruptory rates; which is simple incharacter,

reliable in operation, and which may be readily manufactured and sold ona practical and commercial scale at a low cost.

Other and further objects and advantages of the present invention willbecome apparent from the following description taken in conjunction withthe accompanying drawing; in which F g. 1 illustrates a side elevationalview of a vibrator embodying the principles of. the present invention;and

Fig. 2 depicts a top elevational view of the vibrator shown in Fig. i.

- While a preferred embodiment of th invention is described herein, itis contemplated that considerable variation may be made in the method ofprocedure and the construction of parts without departing from thespirit of the invention. In the following description, and-in theclaims, parts will be identified by specific names, for convenience, butthey are intended to be as generic in their application to similar partsas the art will permit.

Referring now more particularly to the drawing, reference character l0denotes a ferromagnetic frame member having the end of its hook portionnarrowed down to a horizontally extending pole piece ll around whichthere is mounted 2 a driver coil l2. On the other end of the framemember there is mounted a stack which progressing from the frame membercomprises a pair of 'insulative spacers l3 and I4, a pair of sidesprings it, a pair of insulative spacers l6 and ll between which thereis clamped one end of a hinge plate II, a second pair of side springsIS, a pair of insulative spacers and 2 I, and a metal plate 22.

The stack is held together by means of bolts 23 and nuts 24 in theconventional manner, said bolts being insulated from the side sp s ymeans of ,conventional insulating bushings (not shown), as those skilledin the art-will readily understand.

The vibratory system is carried by the aforesaid hinge section or plateI. made of flexible spring material to which there are secured a pair ofside arms 25 and 2B and also one end of an elongated rigid lever arm orrod 21 b means of rivets 28. The free end of lever 21 carries anarmature or weight 29 extending into cooperatelectromagnet l2.

ing position with pole piece ll of the driver Side arms 25 and 26respectively carry vibratory contacts 30 and 3 i, adapted to cooperatewith relatively fixed contacts 32, 33,

respectively carried by side springs l5 and It. ,It will be noted thatin the vibratory system of the present invention the reed section from.the point of attachment of the side arms 25, 26,

to armature 29 is made of material of suflicient thickness thatpractically no bending of this section is obtained in normal operation.On the other hand, the lower or hing section of the reed is made fromflexible spring material so that normal starting conditions areobtained. Likewise, the side springs are from elongated flexiblematerial of such character that practically all of the compliance of thesystem is in the side springs.

From the foregoing description the operation of thevibrator embodyingthe invention will be readily understood by those skilled in the art.The circuit organization being of conventional character does notrequire any further explanation. in operation, the stiff section of thevibratory system, arm 21, acts as a lever operating about a pivotingpoint, some place in the reed hinge section It. The length of saidlever, the mass of armature 29 at its end, the contact spacing distance,and the compliance of side springs i5, I! then determine the operatingfrequency at any given coilenergy. Experience has demonstrated that theprinciples of the invention make it possible to obtain relatively highoperating frequencies without any manufacturing difllculties.

3.5 watts maximum, into mechanical energ with which to deflect two pairsof contact springs, as

this is necessary in self-rectifying vibrators. Of course, theprinciples of the invention are also readily applicable with equal orsimilar results to non-synchronous vibrators having only one pair ofcontacts.

A further important advantage of the vibrator embodying the invention isthat it tends to eliminate spurious oscillations of thecontact-supporting members, particularly during the closed contactintervals, which are unavoidable in conventional vibrators havingcompliant reeds. over, the vibrator of the invention is much moreeifective in producing high contact pressure and deflection of its sidesprings than prior structures. I

While the present invention, as to its objects and advantages, has beendescribed herein as carried out in specific embodiments thereof, it isnot desired to be limited thereby but it is intended to cover theinvention broadly within the spirit and scope of the appended claims.

What is claimed is:

1. A vibrator electromagnetic interrupter which comprises in combinationa flexible h inge P te cl ped at one of its ends and carrying a set ofvibratory contacts at its other end, a plurality of compliant sidesprings clamped at one oi their ends and each carrying a contact at itsother end for cooperation with a vibratory contact, a non-compliantactuating rod having one of its ends connected to said set of vibratorycontacts and having its other end extending away therefrom and carryinga ferromagnetic weight, and a driver electromagnet applying deflectingforce to said weight.

2. A vibratory electromagnetic interrupter which comprises incombination a stack, a flexible hinge plate having one of its endsclamped in sai stack and carrying a pair of side arms at its other end,at least one vibratory contact on each of said side arms, a plurality ofrelatively compliant side springs having one of their ends clamped insaid stack and each carrying a relatively fixed contact at its other endadapted to respectively cooperate with said vibratory contacts, anoncompliant actuating rod having one of its ends connected to said sidearms and having its other end extending away from said stack andcarrying a ferromagnetic weight, and a driver electromagnet applyingdeflecting force to said weight.

3. A vibratory electromagnetic interrupter which comprises incombination a ferromagnetic frame having a stack mounted at one endthereof and having its other end bent back and carrying a driver coil, aflexible hinge plate having one of its ends clamped in said stack andhaving a pair of side arms secured to its other end and extending awaytherefrom, vibratory contacts on Moreeach of said side arms, a pluralityof relatively compliant side springs having one or their ends clamped insaid stack and each carrying a relatively fixed contact at its other endadapted to respectively cooperate with said vibratory contacts, and anon-compliant actuating rod having one of its ends connected to saidside arms and carrying an armature at its other end extending into themagnetic fleld of said driver coil for transferring deflecting force tosaid vibratory contacts.

I 4. A vibratory electromagnetic interrupter hich' comprises incombination a ferromagnetic framehaving' a stack mounted at one endthereof and having its other end bent back and carrying a driver coil, aflexible hinge plate having one of its ends clamped in said stack andhaving a pair of side arms secured to its other end and extending awaytherefrom, vibratory contacts on each of said side arms, a plurality ofrelatively compliant side springs having one of their ends clamped insaid stack and each carrying a relatively flxed contact at its other endadapted to respectively cooperate with said vibratory contacts, and anon-compliant actuating rod having one of its ends connected to saidside arms and carrying an armature at its other end extending into themagnetic field of said driver coil for transferring deflecting force tosaid vibratory contacts, the length of said actuating rod being amultiple of that of the free portion of the said hinge plate.

5. A vibratory electromagnetic interrupter which comprises incombination a stack, a hexible hinge plate having one of its endsclamped in said stack and carrying a pair of side arms at its other end,at least one vibratory contact on each of said side arms, a plurality ofcompliant side springs having one of their ends clamped in said stackand each carrying a relatively fixed contact at its other end adapted torespectively cooperate with said vibratory contacts, a noncompliantactuating rod having one 01 its ends connected to said side arms andhaving its other end extending away from said stack and carrying aferromagnetic weight, and a driver electromagnet applying deflectingforce to said weight, substantially all of the compliance of saidinterrupter being in said side springs whereby the production ofspurious oscillations of the contactsupporting members is prevented.

ROBERT J. AUST.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,168,113 Best Aug. 1, 19392,190,685 Slater Feb. 20, 1940 2,223,573 Nulsen Dec. 3, 1940 2,252,882Dressel Aug. 19, 1941

